The Worst Episodes of What on Earth?

A mystery in Hawaii points to human sacrifice and a shape-shifting god.

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Satellites lead experts to an island that may be linked to a massacre.

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Satellites capture evidence of catastrophic and secret military testing.

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Satellite images capture a giant symbol mysteriously carved into the expanse of Australia's Great Victoria Desert; an investigation reveals a secret nuclear weapons-testing cover-up by the British government with numerous aboriginal casualties.

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Satellites capture bizarre circular structures in the forests of England.

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Satellites capture mysterious stone objects across the Arizona mountains.

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Satellites capture a castle-like structure hidden in Scottish woodlands.

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Satellites capture rocks in the shape of a fingerprint on a Swedish island.

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Satellites capture a bizarre pattern of circles in a remote English forest.

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Aerial imaging captures a complex of ancient Roman buildings in Yorkshire.

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Satellites capture a gigantic oval carved into the forests of New Jersey.

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Satellites capture a mysterious collection of ghost towns in Belarus.

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Satellites capture a cone-like structure in the mountains of Turkey.

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Satellites capture a bizarre industrial complex in desert of Kazakhstan.

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Satellites capture dozens of parallel lines hidden in Polish woodlands.

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Satellites capture bizarre structures on the Greek island of Kefalonia.

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Satellites capture ruins amid bizarre structures on a Welsh mountaintop.

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Satellite images capture a triangular castle-like tower located on the Mediterranean island of Sardinia; experts investigate the relics of a declining ancient civilization that may have suffered a celestial catastrophe.

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Satellite images capture two conjoined circular structures embedded in the lush and rolling landscape of Ireland; experts investigate and uncover an ancient site linked to legendary figures and the elusive hunt for the Ark of the Covenant.

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Drone images capture oddly shaped towers in a forest clearing near Moscow.

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Satellites capture a series of zigzagging patterns in Polish woodlands.

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Drone images capture enormous holes scattered along the Dead Sea coastline.

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Satellites capture bizarre markings etched deep in the mountains of Spain.

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Satellite capture a bizarre pattern obscuring an eastern Atlantic island.

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Aerial archaeologists use laser imaging to capture a distinct star-shaped pattern carved into the marsh of a Florida swamp; experts investigate and reveal a lost Civil War fort linked to an extraordinary community with a tragic past.

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